Fluid pumps, fluid motors and devices, which include a coned ring

Abstract

In a fluid pump or motor improvements are provided to the piston shoes therein to permit a higher pressure in the respective device. Other improvements are done to the hydrostatic bearings in radial piston or radial chamber type fluid motors and pumps. A further arrangement is, that plural pistons are applied to permit the use of two different fluids in the respective device. This leads also to the application of disc springs and their modification in a pump or motor to make the pumping of non-viscous fluids like water possible at very high pressure.

What is claimed, is: 
     
       1. A hydrostatic pump, comprising, in combination, at least one working chamber for the reception and   exhaustion of a fluid, inlet means and outlet means communicated to said chamber, at least one pair of coned rings adjacent to said chamber to border said chamber at least partially in two axially opposed directions with said coned rings symmetrically arranged about said chamber, at least one piston movable along its longitudinal axis to at least indirectly bear on one of said coned rings with said piston subjected to a drive means to move said piston along its longitudinal axis in periodic reciprocal movements to periodically increase and decrease the volume of said chamber by periodically expanding and compressing said coned rings and an improvement,   wherein said improvement comprises a combination,   wherein said combination includes the provision of an outer ring with planar axial end faces and said outer ring provided between the radial outer ends of said coned rings,   wherein said outer ring plate provides a distance between said coned rings and a seal ring bed radially inward of said outer ring and between said coned rings,   wherein a flexible seal ring is inserted into said seal ring seat,   wherein a planar inner ring of a thickness substantially equal to the thickess of said outer ring is inserted radially inward of said seal ring and between said coned rings, and,   wherein said outer ring extends radially outwardly beyond the outer diameters of said coned rings,   
     
     
       2. The pump of claim 1, wherein a surrounding ring is laid radially outwards of said outer ring to, surround said outer ring, while said surrounding ring extends axially in both directions from said outer ring,   wherein an annular groove extends from the inner diameter of said surrounding ring radially outwardly directed into said surrounding ring, and,   wherein said outer ring extends partially into said annular groove of said surrounding ring.   
     
     
       3. A hydrostatic pump, comprising, in combination, at least one working chamber for the reception and   exhaustion of a fluid, inlet means and outlet means communicated to said chamber, at least one pair of coned rings adjacent to said chamber to border said chamber at least partially in two axially opposed directions with said coned rings symmetrically arranged about said chamber, at least one piston movable along its longitudinal axis to at least indirectly bear on one of said coned rings with said piston subjected to a drive means to move said piston along its longitudinal axis in periodic reciprocal movements to periodically increase and decrease the volume of sid chamber by periodically expanding and compressing said coned rings and an improvement,   wherein said improvement comprises a combination,   wherein said combination includes the provision of an outer ring with planar axial end faces and said outer ring provided between the radial outer ends of said coned rings,   wherein said outer ring provides a distance between said coned rings and a seal ring bed radially inward of said outer ring and between said coned rings,   wherein a flexible seal ring is inserted into said seal ring seat;   wherein said outer ring extends radially outwardly beyond the outer diameters of said coned rings,   wherein said pair of coned rings with said outer ring between them are clamped together by a clamping means, and,   wherein said clamping means is provided by ring means which include clamping portions which embrace the radial outer ends of said coned rings axially and which are radially divided into ring sections with at least one bolt provided to hold the ring portions of the respective section of said rings together.   
     
     
       4. A hydrostatic pump, comprising, in combination, at least one working chamber for the reception and   exhaustion of a fluid, inlet means and outlet means communicated to said chamber, at least one pair of coned rings adjacent to said chamber to border said chamber at least partially in two axially opposed directions with said coned rings symmetrically arranged about said chamber, at least one piston movable along its longitudinal axis to at least indirectly bear on one of said coned rings with said piston subjected to a drive means to move said piston along its longitudinal axis in periodic reciprocal movements to periodically increase and decrease the volume of said chamber by periodically expanding and compressing said coned rings and an improvement   wherein said improvement comprises a combination   wherein said combination includes the provision of an outer ring with radially plane axial end faces and said outer ring provided between the radial outer ends of said coned rings,   wherein said outer ring provides a distance between said coned rings and a seal ring bed radially inward of said outer ring and between said coned rings, and,   wherein a flexible seal ring is inserted into said seal ring seat,   wherein a piston shoe is interposed between said one of said coned rings and said piston,   wherein said piston is provided with a slide face which is laid upon a stroke guide face of an eccentric cam of said drive means,   wherein fluid pressure balancing pockets are provided in said piston,   wherein said piston includes lateral radially plane face portions and passages which extend from said pockets into passage ports which port into said plane face portions, and,   wherein said piston is provided in a cylinder which is provided in a portion of a housing while at least one thrust chamber is provided in said housing in the neighborhood of said piston and a thrust body provided in said thrust chamber with a thrust head with a radially plane head face and a passage longitudinally through said thrust body to meet at least one of said passage ports while fluid under pressure in said thrust chamber presses said head face against a respective face portion of said face portions and thereby to seal the flow of pressure fluid from said thrust chamber into said passages and into said fluid pressure pockets in said piston.   
     
     
       5. A hydrostatic pump, comprising, in combination, at least one working chamber for the reception and   exhaustion of a fluid, inlet means and outlet means communicated to said chamber, at least one pair of coned rings adjacent to said chamber to border said chamber at least partially in two axially opposed directions with said coned rings symmetrically arranged about said chamber, at least one piston movable along its longitudinal axis to at least indirectly bear on one of said coned rings with said piston subjected to a drive means to move said piston along its longitudinal axis in periodic reciprocal movements to periodically increase and decrease the volume of said chamber by periodically expanding and compressing said coned rings and an improvement,   wherein said improvement comprises a combination   wherein said combination includes the provision of an outer ring with radially plane axial end faces and said outer ring provided between the radial outer ends of said coned rings,   wherein said outer ring provides a distance between said coned rings and a seal ring bed radially inward of said outer ring and between said coned rings, and   wherein a flexible seal ring is inserted into said seal ring seat,   wherein a piston shoe is interposed between said one of said coned rings and said piston,   wherein said piston is provided with a slide face which is laid upon a stroke guide face of an eccentric cam of said drive means,   wherein fluid pressure balancing pockets are provided in said piston,   wherein said piston includes lateral radially plane face portions and passages which extend from said pockets into passage ports which port into said plane face portions,   wherein said piston is provided in a cylinder which is provided in a portion of a housing while at least one thrust chamber is provided in said housing in the neighborhood of said piston and a thrust body provided in said thrust chamber with a thrust head with a radially plane head face and a passage longitudinally through said thrust body to meet at least one of said passage ports while fluid under pressure in said thrust chamber presses said head face against a respective face portion of said face portions and thereby to seal the flow of pressure fluid from said thrust chamber into said passages and into said fluid pressure pockets in said piston, and;   wherein a fluid motor is provided in said housing,   wherein said fluid motor is provided with a shaft, and,   wherein said shaft of said fluid motor carries said cam.